test_sketch.py::test_manysketch_skipm2n3 is failing on main?

[ctb]

src/python/tests/test_sketch.py::test_manysketch_skipm2n3

>       assert len(sigs) == 3  # 3 dna, 3 skipmer. But sourmash can only read the DNA sigs!!
E       AssertionError: assert 6 == 3
E        +  where 6 = len([SourmashSignature('short3', f85747ac), SourmashSignature('short3', 890557b3), SourmashSignature('short', 1474578c), SourmashSignature('short', 0486fcae), SourmashSignature('short2', 4efeebd2), SourmashSignature('short2', ec6305f5)])

not sure if it's my laptop, or what.

[bluegenes]

Ah, this test assumed we could not read skipmer signatures with sourmash python layer. Needs to be updated now that we ~can.

[ctb]

Fixed in #568